hoffmann



(No Model.) Ye sheets-sheen 1. G. HOFFMANN.

com: OVEN. No. 492,400. Patented Feb. 28,1893.

e shet--shemy 2. G.. HOFFMANN.

'COKE OVEN'.

Patented Feb. 28, 1893.

(No Model.)

L t .Bv ,e h, s e e h S 6 N. N. Am .M Pw PE OK Hw aw (No Model.)

.J .m w f, n 0 no U f4 1|. o l 7 00 I M 7 9.. .hm Dv mr., .d .w J n l Lwa P Tm w f, .gw

Wz'vudse's.' ,mm

sheets-#sheet 5.

(No Model.)

G, HOFFMANN.

COKE OVEN.

Patented Feb; '28, 1893.

Wmarrw.

(No Model.) 6 Sheets-Sheet 6.

G. HOFFMANN. 1

VCOKE oV-BN. No. 492,400. Patented Feb. 28, 1893.

A UNTTnn STATES PATENT Genion...

GUSTAV HOFFMANN, VOF GOTTESBERG, GERMANY.

COKE-OVEN.

SPECIFICATION forming part ef Letters resent No. 492,400, dated February2e, 189e.

Application filed May 13, 1892. Serial No. 432,909. (No model.)

T0 all whom it may concern:

Be it known that I, GUsTAv HOFFMANN, a subject of the Emperor ofAustria-Hungary, residing at Gottesberg, in the Kingdom of Prussia,German Empire, have invented oertain Improvements in Regenerative Coke-Ovens, of which the following is a specification.

The object of the present invention is to highly and uniformly heat thesides and bottoms of coking ovens, with the View of securing the bestresults in the manufacture of coke and luy-products.

My invention attains the desired results by securing the completecombustion of the coal gases returned from the condenser, the air forsuch combustion being previously heated to the highest possible degree.

For the heating of the air used in the combustion, the regenerators B,B, connect with the coke ovens A, and as illustrated in the accompanyingdrawings, said regenerators are located in the cooling off canalsleading from the coking ovens to the chimney. The regenerators B and Bcan be arranged at any other suitable place, or be entirely replaced byother air heating apparatus.

In the accompanying drawings forming part of this specification, Figure1, is a vertical section through a coking oven A, transversely throughthe regenerators B and B; on the lines 1-2, Figs. 3, 4, and 5. Fig. 2 isa vertical section through the side walls of the coking oven, the canalC and vertical conduit b and b said section being taken on the line3--4, Figs. 3, 4 and 5. Fig. 3 is a vertical section transverselythrough a coking oven A, with the length of the regenerator B; on line 56, Figs.4 and 5. Fig.4 is a horizontal section through the canals L andL', a and a', and opening f; on line 9-10, Fig. 1. Fig. 5 is ahorizontal section through the canals D and E, D'and E; on the line1112, Fig. l. Fig. 6 is a vertical section from the deflecting damperw', through the canals E and E', on line 7-S, Figs. 4 and 5.

As illustrated, the coke ovens are formed by long narrow chambers A,Figs. 1 and 3, each of which is almost oblong, and has its end closed bymeans of gas tight doors. These chambers, A, are supplied with the coalthrough the openings F, Fig. 1, the doors for which are also adapted tobe made gas tight. The gas developed from the coal in the coking ovens,is conducted during the coking operation through the pipes g F, Fig. 1,and the gas exhaust conduit s (same figure); into the condenser notshown. If the gases have been cooled off in this apparatus, and havethereby become separated from the tar and ammonia, the cold gasesreturnV through the gas conduit M, Fig. 4, to the oven. The cold gasescoming from the condenser, enter alternately into the pipes R and R',Figs. 1, 2 and 4. The passage these gases take depends upon the positionof the gas valve o and v', in the conduits R, R', Fig. 4. The gases gofrom the gas conduits R, R', through the pipes r r', and circulatebeneath the floor of the separate ovens, and pass into the chambers Land L',

Figs. 1 and 4. If the valve o in the gas conduit is open, and valve U isclosed, the gases coming from the condenser are led to the conduit R',from which they pass by way of the pipe r into the chamber L' beneaththe ioor of the oven, Fig. 1. The air for the combustion of the gases isforced through the tube K, Figs. 4 and 6, and the delecting damper w,and enters through this near the same as in the position shown in Fig.6, into the canal E', passes through the canalD', Fig. 5, enters theregenerator B through the numerous small openings d', is then heated andpasses through the opening f' into the canal L', where it iskmixed Withgas, comes through r', and effects the complete combustion. (See Figs. 1to.) The hot products of combustion fed through the opening a', Fig. 1,ascend in the shaft b between the side Walls of the oven, Figs. 2 and 3,collect in canal c, and are then discharged downwardly through theshafts ZJ and enter into the canal L, Figs. 1 and 4. From the latterthey enter the regenerat-or chamber by way of opening f, and heat themasonry work of the same, then pass through the ,numerous small openingsd into the canals D, float along the saine and enter the canal E, fromwhere they reach the chimney through the deiiecting dampers w, Figs. 1to 6.- After this operation has been conducted for a suitable period oftime, say anywhere from thirty to sixty minutes, the operation isreversed by changing the position of the valvesoand o', in the gasconduits IOO R and R', Figf4. and that of the deflecting damper w in theair conduits K, Figs. 4 to 6. Then the gas, returning from thecondenser, enters the conduit R, and from this passes to the canal L byWay of tube r; While the combustion air goes through the deecting damperfw and canal E into the canals D, and through the numerous smallopenings d into the generator B, then heated and reaches the canal Lthrough f. The products of combustion then go through ct into the shaftb, rise in the same, collect in the canal c, descend through the shaftZJ and enter the canal L by passage d and then pass from said canal intothe generator D by Way of the opening f', to heat said regenerator. Theair then passes through the numerous small openings CZ' into the canalD', and from this latter through the canalsE and the deflecting damper wto the chimney. The small openings in F, are connected with the interiorof the oven Walls, Figs. l and 2, and are intended when heating themasonry of the oven, before the operation is Well under way, to lead thegases developed into the canals c Fig. 2, into which air from thecombustion of the sameis led through canals h from the regenerators Band B. The gases thus obtained How' through vertical conduits b and b',Fig. 2,- through a and a into the chambers L and L', Figs. 1 and 3, thenfrom there throughfand f into the regenerators B and B', and in thepreviously described regular manner to the chimney.

When the Working is actually commenced, the openings o and h, Figs. 1and 2, and the valves u, Fig. 5 are closed. These valves u, as shown inFigs. 5 and 6 are arranged to supply air to the canals D, D, D, D',independently of the pipe K and valve W.

I claimg In combination the ovens having the coinbustion chambers underthe same, and the shafts b extending about them, the canals c at the topof said shafts, the regenerators B, B With air passages leadingthereto,- the gasr conduits F leading from the ovens and the ports oconnecting the same with the canals GUSTAV HOFFMANN.

Witnesses:

RElNHoLD FRIEsE SCHUTZMANN, THEODOR EHRENBERG.

